3.73 Putrescine, a substance produced by has the empirical formula C2H&N. Several determinations of molecular weight give values in the range of 87 to 90 amu. Find the molecular formula of putrescine decaying animals, 3.88 Using the following reaction (depicted using molecular models), large quantities of ammonia are burned in the presence of a platinum catalyst to give nitric oxide, as the first step in the preparation of nitric acid. Suppose a vessel contains 5.5 g of ammonia, how many grams of oxygen are needed for a complete reaction? 3.105 A sample of limestone (containing calcium carbonate, Caco,) weighing 438 mg is treated with oxalic acid, H2C204, to give calcium oxalate, CaC2O4. CacO3(s) + H2C;Oa(aq) → CaC;Oa(s) + H20() + CO2(g) The mass of the calcium oxalate produced is 469 mg. What is the mass percentage of (ans: 83.6%) calcium carbonate in this limestone?

3.73 Putrescine, a substance produced by has the empirical formula C2H&N. Several determinations of molecular weight give values in the range of 87 to 90 amu. Find the molecular formula of putrescine decaying animals, 3.88 Using the following reaction (depicted using molecular models), large quantities of ammonia are burned in the presence of a platinum catalyst to give nitric oxide, as the first step in the preparation of nitric acid. Suppose a vessel contains 5.5 g of ammonia, how many grams of oxygen are needed for a complete reaction? 3.105 A sample of limestone (containing calcium carbonate, Caco,) weighing 438 mg is treated with oxalic acid, H2C204, to give calcium oxalate, CaC2O4. CacO3(s) + H2C;Oa(aq) → CaC;Oa(s) + H20() + CO2(g) The mass of the calcium oxalate produced is 469 mg. What is the mass percentage of (ans: 83.6%) calcium carbonate in this limestone?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

The mineral galena is composed of lead(II) sulfide and hasan average density of 7.46 g/cm³. (a) How many moles oflead(II) sulfide are in 1.00 ft³of galena? (b) How many leadatoms are in 1.00 dm³of galena?
(brisugus (B) Petrol having an analysis by mass C0.85 and H. 0.15 is burned with 14 times its mass of air, this being insufficient for complete combustion. Assume that all the H2 is burned, no carbon is deposited and that there is no free oxygen in the exhaust. Given that air contains 23.2 per cent of oxygen by mass détermine, per kg of petrol:- a) the mass of carbon burning to CO, b) the mass of each of the gases in the exhaust. INIer
(3)Galactose is found in milk sugar and is used for diagnosing liver function. What is the molecular formula of galactose if the empirical formula is CH₂O and the molar mass is 180 g/mol?
Table salt, NaCI(s), and sugar, C,,H„O,(s), are accidentally mixed. A 5.50 g sample is burned, and 2.80 g of CO, (g) is (12 produced. What was the mass percentage of the table salt in the mixture? percentage of NaCl:
2. An excess of reagent A and 419.15 g of reagent B shown below are reacted together to give product C. (a) Using the full formulae, (NOT line structures), give the equation showing the formation of C. (b) What is the name of product C? (c) How many moles of C will be produced, assuming 98.9% of B is converted? (d) What is the mass of one molecule of C, in grams? HO. он A. B
Give correct detailed Solution
. Fulgurites are the products of the melting that occurswhen lightning strikes the earth. Microscopic examinationof a sand fulgurite shows that it is a globule with variablecomposition that contains some grains of the definitechemical composition Fe 46.01%, Si 53.99%. Determinethe empirical formula of these grains.
Nitrogen and hydrogen combine at a high temperature, in the presence of a catalyst, to produce ammonia. N, (g) + 3 H, (g) · 2 NH,(g) Assume 0.120 mol N, and 0.387 mol H, are present initially. After complete reaction, how many moles of ammonia are produced? NH3: mol Incorrect How many moles of H, remain? H,: mol Incorrect
The Chemistry of Crop Rotation Background Information: Plants need nitrogen to make amino acids, but they can't use the N2 in the air, which is why farmers and gardeners often turn to fertilizer. Fertilizer is made up of sources of nitrogen that the plant can use, among other things. One of the most common components used is ammonium nitrate, because of its high percent composition of nitrogen and because all of that nitrogen is in forms that the plant can use. 1. Find the formula and molar mass for ammonium nitrate. Formula: Molar mass: 2. What is the percent composition of nitrogen in ammonium nitrate? Answer:
0 3.76 Consider the mixture of propane, C,Hg, and O2 shown below. (a) Write a balanced equation for the combustion reaction that Occurs between propane and oxygen. (b) Which reactant is the limiting reactant? (c) How many molecules of CO, H2O, C;Hs, and O, will be present if the reaction goes to completion?
If copper were to be heated to a high temperature and react with O2 in air, rather than in a covered beaker, to form solid copper (II) oxide, what affect would this have on a calculated percent of recovered solid copper
(b) Look at their results Mass of calclum carbonate (a) Mass of calcium oxide Mass of carbon dioxlde (g) (g) 1.00 0.56 0.44 2.00 1.12 0.88 13 3.00 1.68 1.32 4.00 2.24 Complete the table [1] (c) StudentA states: If I heat 20g of calciumi carhohate will make 8.Rg of caloium oxide and 11.2g of carbon dioxide. 14 Is student A correct? Explain your answer. J 12°C Clear ヘ点d 06/10/2021 O Type here ro search